Gigabyte GA-K8VM800M -???- AMD Athlon 64 2800+ Corsair VS1GBKIT400 1GB Kit DDR400 PC3200 -???- Asus A9600PRO/TD Radeon 9600 PRO AGP 8X 128MB DDR Western Digital WD Caviar WD800JD 80GB Serial ATA 7200RPM Pioneer DVR-110 Dual Layer DVD±RW Writer Thermaltake Dream Tower Series -Tsunami VA3000BWA Aluminum Mid Tower Case (Black) Coolermaster RS-430-PMSR/P eXtreme Power 430W the computer suppose to be for my cousin. so...what do you say? should I take another motherboard or memory? and is the power supply good? and by the way...if the motherboard specs says PC3200 DDR400 can you put for example PC4000 ?
I'm not sure how reliable CoolerMaster's power supplies are, so I would at least consider something by Enermax, Tagan, Hiper, or Antec. Check what the 12V rail is spec'd. I believe that the CoolerMaster you're looking at doesn't have 20A on the 12V rail, and more likely around 18A which might work if this isn't going to be a gaming rig. For the higher speed RAM, yes you can use it, but unless you plan to overclock heavily, you're going to find getting PC4000 to be a worthless investment. The system may be fine for your cousin, but that depends on what it's going to be used for.